421103221 has 16 divisors (see below), whose sum is σ = 536186880. Its totient is φ = 321148080.

The previous prime is 421103183. The next prime is 421103227. The reversal of 421103221 is 122301124.

It is not a de Polignac number, because 421103221 - 2¹³ = 421095029 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 421103195 and 421103204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421103227) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 54561 + ... + 61798.

It is an arithmetic number, because the mean of its divisors is an integer number (33511680).

Almost surely, 2^421103221 is an apocalyptic number.

It is an amenable number.

421103221 is a deficient number, since it is larger than the sum of its proper divisors (115083659).

421103221 is a wasteful number, since it uses less digits than its factorization.

421103221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116424.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 421103221 is about 20520.7997163853. The cubic root of 421103221 is about 749.5423703050.

Adding to 421103221 its reverse (122301124), we get a palindrome (543404345).

The spelling of 421103221 in words is "four hundred twenty-one million, one hundred three thousand, two hundred twenty-one".